Financial Instruments (Schedule Of Cross Currency Swap Agreement Not Designated As Hedge) (Detail) (Currency Swap [Member], Maturity Date, November 2013 [Member]) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 USD ($)	Sep. 30, 2012 EUR (€)
Derivative Instruments [Line Items]
Notional amount for foreign currency derivatives		€ 266
Maturity Date	Nov. 30, 2013	Nov. 30, 2013
Fair Value	$ (22)